3 files changed, 147 insertions, 0 deletions
diff --git a/sys-devel/flex/Manifest b/sys-devel/flex/Manifest
index ed41cf8ff7ed..0c527e387c4f 100644
--- a/sys-devel/flex/Manifest
+++ b/sys-devel/flex/Manifest
@@ -1,6 +1,8 @@
 AUX flex-2.6.4-fix-build-with-glibc2.6+.patch 20281 BLAKE2B 859e15a65473a74635db3759f3607fd6a96ffa0949a1b532bd31ad589391d9fee9f14b04c741b3e50224f5e31ce987398344009d8cdb20dadfa15383b6f03067 SHA512 e9a03bf18a6fbc3546d96213cb483d46fa0b18609e03b37c4e5ac5427935d2694bd86ee73cf5c28ffd6bd7cec018f203e82e7c685e9426a7ba2e6d60d2a44135
+AUX flex-2.6.4-implicit-func-decl.patch 1911 BLAKE2B bb4fea60d5b4650d734d761294e2dc91c71d8f9b90c920ac95aeb6c84ee8e08a80e8092ea337aa31f3de183f6da27fde8b43d679d8e19297bc0d225e9bb975d0 SHA512 4d4466e1c8dd9608a9fc0fb0ad37997bc3646f7cbccf7b2d209af302266cbe3f6dc3ed72ead660b4223833bde645343301a698db49544606568d18af5c32d0b1
 AUX flex-2.6.4-libobjdir.patch 770 BLAKE2B 0771af247117123e3efed3e2a0c8a71573c81dc1e8d2e364a887aa49d3bf3a5198042396d1df1e2c0ae196df098241eba0e2b35e953f9a5be3d43d2408a97536 SHA512 76e3a3e19fe9c9b6b3e0fcfea98feb0eaf03fdc683e3695045b3246b57538a52842b455a9aebed87548d2b8ee3e7d34dca5ff355f06648911866b3b621b40f86
 DIST flex-2.6.4.tar.gz 1419096 BLAKE2B c003d4f764f7f4d41e33af7ee28c2af272a9f0aee6ba7c2494ba96722d8d0b18f7a3f745217e9a2cecb43b6863328267a810280670c04464156b3eb3d7ee9d62 SHA512 e9785f3d620a204b7d20222888917dc065c2036cae28667065bf7862dfa1b25235095a12fd04efdbd09bfd17d3452e6b9ef953a8c1137862ff671c97132a082e
 EBUILD flex-2.6.4-r1.ebuild 2022 BLAKE2B 82ba69679aa66e9e66a3e36c037e01902394f9f99e2e057477e3c3f30f5c55a9c0a6c52c69d3a6d6df118f0cbac0c95500e04d17ec01481baf64c7997287d588 SHA512 e25615e3b8f985e07d0c0c6175467484ba09c817e411eb0cb2d30da6ecb036a316745270def159c9e294af506115adcf1c7e0ceb1aa267f2fa280d1ffc1d7d09
 EBUILD flex-2.6.4-r2.ebuild 2326 BLAKE2B 39ec3e1f7392d4705f36a513c6161ddbe147a311d8eecd08e66f1f7ba7cea20dc16b98acc3a280560f66e74766945fc2d47e3ef8d44c1eaac73e0e0c889968b1 SHA512 ed939eea185f0cbc27c2128c3b248494ef66b19f2b6106dce04ab9019a8d9b9d01b40233b44399ba231663938718c76f4ba7eab8b4c8cbedec91180453684126
+EBUILD flex-2.6.4-r3.ebuild 2379 BLAKE2B 4ec76a4aaa73d5bb4145f515d65dd9a86d867ad8fe7b1904fa1916dc6aec42f491a9a2c8a0d896e371dd8b6c5a818b10a148ff3887ec27785324b24936f3dedb SHA512 eef7a159af9235d934cfc8b705b8e35e3a56f379c40957178a77ac9ad5fa0ac00bf5d3cd772520cd11db82e4806f7c13884bae0b7fe0ad9c3ded1392822d1c8b
 MISC metadata.xml 444 BLAKE2B 28bd0cd35c6ab4386dffdf221e6b43927e47971bea62a0f0395e3cd6725567114675055dc1267ce5ffbd42fe4731a806b4e5666ea6b83ad4bcf4d35b5529ce85 SHA512 53f91d714d7f4401f7d986d743c08a817d794147f9b277d829a4e8065ce91ce00123cd5b42957af60ef9051568a214b7ce791aa8a4baf82a5179859971357d56
diff --git a/sys-devel/flex/files/flex-2.6.4-implicit-func-decl.patch b/sys-devel/flex/files/flex-2.6.4-implicit-func-decl.patch
new file mode 100644
index 000000000000..1900ae0529b9
--- /dev/null
+++ b/sys-devel/flex/files/flex-2.6.4-implicit-func-decl.patch
@@ -0,0 +1,50 @@
+https://github.com/westes/flex/commit/4b5111d9772b5c160340ca96f08d30d7f6db5cda
+https://github.com/westes/flex/issues/436
+https://bugs.gentoo.org/705800
+https://developers.redhat.com/blog/2019/04/22/implicit-function-declarations-flexs-use-of-reallocarray
+
+From 4b5111d9772b5c160340ca96f08d30d7f6db5cda Mon Sep 17 00:00:00 2001
+From: Explorer09 <explorer09@gmail.com>
+Date: Mon, 4 Sep 2017 08:28:53 +0800
+Subject: [PATCH] scanner: Include flexdef.h at %top block of scan.l
+
+config.h may define macros that alter the API of the standard library
+funtions, and so it should be included before any other standard
+header, even before the skeleton's standard header inclusion.
+
+For example: config.h may #define _GNU_SOURCE that would expose the
+reallocarray() prototype from <stdlib.h> on glibc 2.26+ systems. If we
+include <stdlib.h> before config.h, reallocarray() would not be
+available for use in lex file since the second include doesn't help
+due to header guard.
+
+For now our config.h might `#define malloc rpl_malloc` -- this
+substitution must work before including stdlib.h, or else the compiler
+will complain about missing prototypes, and may result in incorrect
+code in scan.l (gcc warning: return makes pointer from integer without
+a cast [-Wint-conversion]).
+
+Fixes #247.
+--- a/src/scan.l
++++ b/src/scan.l
+@@ -1,5 +1,11 @@
+ /* scan.l - scanner for flex input -*-C-*- */
+ 
++%top{
++/* flexdef.h includes config.h, which may contain macros that alter the API */
++/* of libc functions. Must include first before any libc header. */
++#include "flexdef.h"
++}
++
+ %{
+ /*  Copyright (c) 1990 The Regents of the University of California. */
+ /*  All rights reserved. */
+@@ -32,7 +38,6 @@
+ /*  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
+ /*  PURPOSE. */
+ 
+-#include "flexdef.h"
+ #include "parse.h"
+ extern bool tablesverify, tablesext;
+ extern int trlcontxt; /* Set in  parse.y for each rule. */
+
diff --git a/sys-devel/flex/flex-2.6.4-r3.ebuild b/sys-devel/flex/flex-2.6.4-r3.ebuild
new file mode 100644
index 000000000000..1f1ebfe61893
--- /dev/null
+++ b/sys-devel/flex/flex-2.6.4-r3.ebuild
@@ -0,0 +1,95 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit flag-o-matic libtool multilib-minimal toolchain-funcs
+
+DESCRIPTION="The Fast Lexical Analyzer"
+HOMEPAGE="https://github.com/westes/flex"
+SRC_URI="https://github.com/westes/${PN}/releases/download/v${PV}/${P}.tar.gz"
+
+LICENSE="FLEX"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+IUSE="nls static test"
+RESTRICT="!test? ( test )"
+
+# We want bison explicitly and not yacc in general, bug #381273
+RDEPEND="sys-devel/m4"
+BDEPEND="${RDEPEND}
+	nls? ( sys-devel/gettext )
+	test? ( sys-devel/bison )"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-2.6.4-libobjdir.patch
+	"${FILESDIR}"/${PN}-2.6.4-fix-build-with-glibc2.6+.patch
+	"${FILESDIR}"/${P}-implicit-func-decl.patch
+)
+
+src_prepare() {
+	default
+
+	# Disable running in the tests/ subdir as it has a bunch of built sources
+	# that cannot be made conditional (automake limitation). bug #568842
+	if ! use test ; then
+		sed -i \
+			-e '/^SUBDIRS =/,/^$/{/tests/d}' \
+			Makefile.in || die
+	fi
+
+	# Prefix always needs this
+	elibtoolize
+}
+
+src_configure() {
+	use static && append-ldflags -static
+
+	multilib-minimal_src_configure
+}
+
+multilib_src_configure() {
+	if tc-is-cross-compiler ; then
+		# Similar to workaround for procps:
+		# - bug #705800
+		# - https://sourceforge.net/p/psmisc/bugs/71/
+		# - https://lists.gnu.org/archive/html/autoconf/2011-04/msg00019.html
+		export ac_cv_func_malloc_0_nonnull=yes \
+			ac_cv_func_realloc_0_nonnull=yes
+	fi
+
+	# Do not install shared libs, #503522
+	ECONF_SOURCE="${S}" econf \
+		CC_FOR_BUILD="$(tc-getBUILD_CC)" \
+		--disable-shared \
+		$(use_enable nls)
+}
+
+multilib_src_compile() {
+	if multilib_is_native_abi; then
+		default
+	else
+		emake -C src -f Makefile -f - lib <<< 'lib: $(lib_LTLIBRARIES)'
+	fi
+}
+
+multilib_src_test() {
+	multilib_is_native_abi && emake check
+}
+
+multilib_src_install() {
+	if multilib_is_native_abi; then
+		default
+	else
+		emake -C src DESTDIR="${D}" install-libLTLIBRARIES install-includeHEADERS
+	fi
+}
+
+multilib_src_install_all() {
+	einstalldocs
+	dodoc ONEWS
+	find "${ED}" -name '*.la' -type f -delete || die
+	rm "${ED}"/usr/share/doc/${PF}/COPYING || die
+
+	dosym flex /usr/bin/lex
+}